57420 Zip Code
57420 zip code is located close to the center of South Dakota. 57420 zip code is part of Walworth County. 57420 zip code has 46.22 square miles of land area and 0.02 square miles of water area. As of 2010-2014, the total 57420 zip code population is 61, which has shrunk 33.70% since 2000. The population growth rate is much lower than the state average rate of 10.58% and is much lower than the national average rate of 11.61%. 57420 zip code median household income is $47,917 in 2010-2014 and has grown by 80.63% since 2000. The income growth rate is much higher than the state average rate of 42.67% and is much higher than the national average rate of 27.36%. 57420 zip code median house value is $18,000 in 2010-2014 and has grown by 53.85% since 2000. The house value growth rate is lower than the state average rate of 70.48% and is higher than the national average rate of 46.91%. As a reference, the national Consumer Price Index (CPI) inflation rate for the same period is 26.63%. On average, the public school district that covers 57420 zip code is much better than the state average in quality. The 57420 zip code area code is 605.